SENTRY REX 19-01
An E-3 Sentry of the 552nd Air Control Wing lines-up on the main runway while an Oklahoma Army National Guard UH-60M Blackhawk of the 1-244th Aviation Regiment prepares to take-off for a SENTRY REX 19-01 mission Jan. 15, 2019, Tinker Air Force Base, Oklahoma. SENTRY REX 19-01 was a multi-service exercise run out of Tinker AFB from Jan. 14-18 focusing on combined force rescue operations of downed aircrew. (U.S. Air Force photo/Greg L. Davis)